[MM-41147] Remove cloud sysadmin access to migrate config API (#19373)

* remove cloud sysadmin access to migrate config API

* reflect review comments

* Update i18n/en.json

Co-authored-by: Claudio Costa <cstcld91@gmail.com>

Co-authored-by: Claudio Costa <cstcld91@gmail.com>

i18n/en.json

@@ -1454,6 +1454,10 @@
     "id": "api.config.migrate_config.app_error",
     "translation": "Failed to migrate config store."
   },
+  {
+    "id": "api.config.migrate_config_restricted.app_error",
+    "translation": "Config migration is restricted due to instance type."
+  },
   {
     "id": "api.config.patch_config.diff.app_error",
     "translation": "Failed to diff configs"